发明名称 |
PROJECTION DISPLAY DEVICE |
摘要 |
A projection display device that displays an image by projecting the image onto a transmissive screen from the rear thereof includes: an illumination optical system for guiding a light beam emitted from a laser light source to the transmissive screen; a projection optical system for enlarging an image formed on a region to be illuminated of an image display element, and projecting the enlarged image on the transmissive screen, the projection optical system being configured such that the product of the F-number and the projection magnification of the projection optical system is less than 400; wherein the transmissive screen includes a Fresnel lens and a lenticular lens respectively equipped with a light diffusion layer for diffusing incident light and causing resultant light to exit the light diffusion layer. The light diffusion layer of the lenticular lens has a thickness of less than 300μm.
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申请公布号 |
US2011075108(A1) |
申请公布日期 |
2011.03.31 |
申请号 |
US20100889531 |
申请日期 |
2010.09.24 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
KOJIMA KUNIKO;KONDO JUN;NAKANO YUZO;SAWANAKA TOMOHIKO |
分类号 |
G03B21/20 |
主分类号 |
G03B21/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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